Species: Gyrinus affinis Aube

Biology: Prefers standing water such as lakes, ponds and even stagnant pools but can also be found in streams.

References:

Oygur, S.and G.W. Wolfe. 1991. Classification, distribution, and phylogeny of North American (North of Mexico) species of Gyrinus Muller (Coleoptera: Gyrinidae). Bull. American Mus. of Nat. Hist. No. 207.